1289288382961 has 8 divisors (see below), whose sum is σ = 1320786621000. Its totient is φ = 1257792629760.

The previous prime is 1289288382959. The next prime is 1289288382997. The reversal of 1289288382961 is 1692838829821.

It can be written as a sum of positive squares in 4 ways, for example, as 179754800625 + 1109533582336 = 423975^2 + 1053344^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1289288382961 - 2¹ = 1289288382959 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1289288382061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 451545 + ... + 1668073.

It is an arithmetic number, because the mean of its divisors is an integer number (165098327625).

Almost surely, 2^{1289288382961} is an apocalyptic number.

It is an amenable number.

1289288382961 is a deficient number, since it is larger than the sum of its proper divisors (31498238039).

1289288382961 is a wasteful number, since it uses less digits than its factorization.

1289288382961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1242419.

The product of its digits is 47775744, while the sum is 67.

The spelling of 1289288382961 in words is "one trillion, two hundred eighty-nine billion, two hundred eighty-eight million, three hundred eighty-two thousand, nine hundred sixty-one".